Display screen or portion thereof with a graphical user interface



The patent or application file contains at least one drawing executed in color. Copies of this patent or patent application publication with color drawing(s) will be provided by the Office upon request and payment of the necessary fee. Further, high-quality electronic copies of the drawings are available in the Office's electronic record of this application.

The FIGURE is a front view of a display screen or portion thereof with a graphical user interface showing our new design.

The broken line showing a display screen or a portion thereof is for the purpose of illustrating environmental structures and form no part of the claimed design. 

CLAIM The ornamental design for a display screen or portion thereof with a graphical user interface, as shown and described. 